/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:44:18,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:44:18,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:44:18,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:44:18,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:44:18,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:44:18,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:44:18,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:44:18,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:44:18,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:44:18,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:44:18,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:44:18,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:44:18,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:44:18,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:44:18,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:44:18,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:44:18,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:44:18,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:44:18,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:44:18,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:44:18,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:44:18,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:44:18,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:44:18,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:44:18,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:44:18,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:44:18,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:44:18,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:44:18,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:44:18,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:44:18,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:44:18,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:44:18,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:44:18,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:44:18,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:44:18,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:44:18,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:44:18,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:44:18,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:44:18,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:44:18,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:44:18,277 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:44:18,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:44:18,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:44:18,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:44:18,279 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:44:18,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:44:18,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:44:18,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:44:18,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:44:18,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:44:18,281 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:44:18,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:44:18,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:44:18,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:44:18,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:44:18,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:44:18,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:44:18,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:44:18,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:44:18,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:44:18,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:44:18,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:44:18,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:44:18,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:44:18,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:44:18,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:44:18,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:44:18,608 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:44:18,609 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:44:18,610 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product30.cil.c [2019-11-07 00:44:18,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29accab66/15af4aee501644fb95600356936a8796/FLAG630ab11b4 [2019-11-07 00:44:19,368 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:44:19,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product30.cil.c [2019-11-07 00:44:19,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29accab66/15af4aee501644fb95600356936a8796/FLAG630ab11b4 [2019-11-07 00:44:19,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29accab66/15af4aee501644fb95600356936a8796 [2019-11-07 00:44:19,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:44:19,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:44:19,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:44:19,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:44:19,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:44:19,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:19" (1/1) ... [2019-11-07 00:44:19,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7100f718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:19, skipping insertion in model container [2019-11-07 00:44:19,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:19" (1/1) ... [2019-11-07 00:44:19,513 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:44:19,596 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:44:20,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:44:20,375 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:44:20,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:44:20,572 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:44:20,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20 WrapperNode [2019-11-07 00:44:20,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:44:20,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:44:20,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:44:20,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:44:20,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... [2019-11-07 00:44:20,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:44:20,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:44:20,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:44:20,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:44:20,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:44:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:44:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:44:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:44:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:44:20,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:44:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:44:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:44:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:44:20,884 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:44:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:44:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:44:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:44:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:44:20,887 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:44:20,887 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:44:20,887 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:44:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:44:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:44:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:44:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:44:20,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:44:20,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:44:20,892 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:44:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:44:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:44:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:44:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:44:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:44:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:44:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:44:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:44:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:44:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:44:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:44:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:44:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:44:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:44:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:44:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:44:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:44:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:44:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:44:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:44:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:44:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:44:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:44:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-11-07 00:44:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:44:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:44:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:44:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:44:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:44:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:44:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:44:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:44:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:44:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:44:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:44:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:44:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:44:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:44:20,904 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:44:20,904 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:44:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:44:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:44:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:44:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:44:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:44:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:44:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:44:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:44:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:44:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:44:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:44:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:44:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:44:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:44:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:44:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:44:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:44:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:44:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:44:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:44:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:44:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:44:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:44:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:44:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:44:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:44:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:44:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:44:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:44:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:44:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:44:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:44:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:44:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:44:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:44:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:44:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:44:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:44:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:44:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:44:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:44:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:44:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:44:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:44:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:44:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:44:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:44:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:44:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:44:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:44:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:44:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:44:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:44:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:44:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:44:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:44:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:44:20,927 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:44:20,927 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:44:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:44:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:44:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:44:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-11-07 00:44:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:44:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:44:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:44:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:44:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:44:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:44:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:44:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:44:20,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:44:20,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:44:20,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:44:23,473 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:44:23,474 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:44:23,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:23 BoogieIcfgContainer [2019-11-07 00:44:23,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:44:23,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:44:23,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:44:23,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:44:23,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:44:19" (1/3) ... [2019-11-07 00:44:23,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eaa150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:23, skipping insertion in model container [2019-11-07 00:44:23,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:20" (2/3) ... [2019-11-07 00:44:23,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eaa150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:23, skipping insertion in model container [2019-11-07 00:44:23,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:23" (3/3) ... [2019-11-07 00:44:23,484 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2019-11-07 00:44:23,494 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:44:23,505 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:44:23,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:44:23,564 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:44:23,564 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:44:23,564 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:44:23,564 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:44:23,564 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:44:23,564 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:44:23,564 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:44:23,565 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:44:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states. [2019-11-07 00:44:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 00:44:23,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:23,628 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:23,630 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash -517745057, now seen corresponding path program 1 times [2019-11-07 00:44:23,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:23,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955840659] [2019-11-07 00:44:23,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:24,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955840659] [2019-11-07 00:44:24,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:24,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:24,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998167292] [2019-11-07 00:44:24,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:24,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:24,400 INFO L87 Difference]: Start difference. First operand 828 states. Second operand 7 states. [2019-11-07 00:44:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:24,724 INFO L93 Difference]: Finished difference Result 1321 states and 2124 transitions. [2019-11-07 00:44:24,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:24,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2019-11-07 00:44:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:24,752 INFO L225 Difference]: With dead ends: 1321 [2019-11-07 00:44:24,753 INFO L226 Difference]: Without dead ends: 669 [2019-11-07 00:44:24,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:44:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-11-07 00:44:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2019-11-07 00:44:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-11-07 00:44:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1057 transitions. [2019-11-07 00:44:24,881 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1057 transitions. Word has length 93 [2019-11-07 00:44:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:24,882 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1057 transitions. [2019-11-07 00:44:24,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1057 transitions. [2019-11-07 00:44:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:44:24,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:24,892 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:24,893 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1718929765, now seen corresponding path program 1 times [2019-11-07 00:44:24,893 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:24,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823625233] [2019-11-07 00:44:24,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:25,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823625233] [2019-11-07 00:44:25,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:25,159 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:25,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855244042] [2019-11-07 00:44:25,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:25,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:25,163 INFO L87 Difference]: Start difference. First operand 667 states and 1057 transitions. Second operand 4 states. [2019-11-07 00:44:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:25,235 INFO L93 Difference]: Finished difference Result 1300 states and 2079 transitions. [2019-11-07 00:44:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:44:25,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-07 00:44:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:25,241 INFO L225 Difference]: With dead ends: 1300 [2019-11-07 00:44:25,242 INFO L226 Difference]: Without dead ends: 649 [2019-11-07 00:44:25,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-11-07 00:44:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 649. [2019-11-07 00:44:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-11-07 00:44:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1024 transitions. [2019-11-07 00:44:25,334 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1024 transitions. Word has length 94 [2019-11-07 00:44:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:25,335 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 1024 transitions. [2019-11-07 00:44:25,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1024 transitions. [2019-11-07 00:44:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:44:25,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:25,339 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:25,340 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash -495368691, now seen corresponding path program 1 times [2019-11-07 00:44:25,340 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:25,340 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667995358] [2019-11-07 00:44:25,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:25,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667995358] [2019-11-07 00:44:25,510 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:25,510 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:25,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300987298] [2019-11-07 00:44:25,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:25,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:25,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:25,512 INFO L87 Difference]: Start difference. First operand 649 states and 1024 transitions. Second operand 7 states. [2019-11-07 00:44:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:25,627 INFO L93 Difference]: Finished difference Result 1269 states and 2021 transitions. [2019-11-07 00:44:25,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:25,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-11-07 00:44:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:25,637 INFO L225 Difference]: With dead ends: 1269 [2019-11-07 00:44:25,637 INFO L226 Difference]: Without dead ends: 643 [2019-11-07 00:44:25,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:44:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-11-07 00:44:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2019-11-07 00:44:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2019-11-07 00:44:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1011 transitions. [2019-11-07 00:44:25,690 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1011 transitions. Word has length 94 [2019-11-07 00:44:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:25,693 INFO L462 AbstractCegarLoop]: Abstraction has 643 states and 1011 transitions. [2019-11-07 00:44:25,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1011 transitions. [2019-11-07 00:44:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:44:25,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:25,698 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:25,698 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:25,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1956512957, now seen corresponding path program 1 times [2019-11-07 00:44:25,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:25,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407634302] [2019-11-07 00:44:25,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:25,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407634302] [2019-11-07 00:44:25,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:25,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:25,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404388572] [2019-11-07 00:44:25,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:25,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:25,910 INFO L87 Difference]: Start difference. First operand 643 states and 1011 transitions. Second operand 7 states. [2019-11-07 00:44:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:26,007 INFO L93 Difference]: Finished difference Result 1257 states and 1995 transitions. [2019-11-07 00:44:26,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:26,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-11-07 00:44:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:26,018 INFO L225 Difference]: With dead ends: 1257 [2019-11-07 00:44:26,018 INFO L226 Difference]: Without dead ends: 637 [2019-11-07 00:44:26,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:44:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-11-07 00:44:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2019-11-07 00:44:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2019-11-07 00:44:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 998 transitions. [2019-11-07 00:44:26,056 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 998 transitions. Word has length 95 [2019-11-07 00:44:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:26,056 INFO L462 AbstractCegarLoop]: Abstraction has 637 states and 998 transitions. [2019-11-07 00:44:26,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 998 transitions. [2019-11-07 00:44:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:44:26,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:26,063 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:26,063 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2132810737, now seen corresponding path program 1 times [2019-11-07 00:44:26,064 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:26,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648530694] [2019-11-07 00:44:26,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:26,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648530694] [2019-11-07 00:44:26,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:26,317 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:26,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352936832] [2019-11-07 00:44:26,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:26,318 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:26,318 INFO L87 Difference]: Start difference. First operand 637 states and 998 transitions. Second operand 7 states. [2019-11-07 00:44:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:26,411 INFO L93 Difference]: Finished difference Result 1245 states and 1969 transitions. [2019-11-07 00:44:26,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:26,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:44:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:26,418 INFO L225 Difference]: With dead ends: 1245 [2019-11-07 00:44:26,418 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:26,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:44:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 985 transitions. [2019-11-07 00:44:26,452 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 985 transitions. Word has length 96 [2019-11-07 00:44:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:26,452 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 985 transitions. [2019-11-07 00:44:26,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 985 transitions. [2019-11-07 00:44:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:44:26,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:26,454 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:26,455 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash -773214734, now seen corresponding path program 1 times [2019-11-07 00:44:26,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:26,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988120370] [2019-11-07 00:44:26,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:26,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988120370] [2019-11-07 00:44:26,638 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:26,642 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:26,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500382427] [2019-11-07 00:44:26,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:26,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:26,645 INFO L87 Difference]: Start difference. First operand 631 states and 985 transitions. Second operand 7 states. [2019-11-07 00:44:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:26,738 INFO L93 Difference]: Finished difference Result 1233 states and 1943 transitions. [2019-11-07 00:44:26,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:26,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:44:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:26,749 INFO L225 Difference]: With dead ends: 1233 [2019-11-07 00:44:26,749 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:26,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:44:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 984 transitions. [2019-11-07 00:44:26,783 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 984 transitions. Word has length 96 [2019-11-07 00:44:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:26,784 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 984 transitions. [2019-11-07 00:44:26,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 984 transitions. [2019-11-07 00:44:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 00:44:26,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:26,787 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:26,788 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2101985241, now seen corresponding path program 1 times [2019-11-07 00:44:26,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:26,788 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744276679] [2019-11-07 00:44:26,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:26,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744276679] [2019-11-07 00:44:26,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:26,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:26,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27024731] [2019-11-07 00:44:26,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:26,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:26,946 INFO L87 Difference]: Start difference. First operand 631 states and 984 transitions. Second operand 5 states. [2019-11-07 00:44:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,086 INFO L93 Difference]: Finished difference Result 1232 states and 1940 transitions. [2019-11-07 00:44:27,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:27,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-11-07 00:44:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,092 INFO L225 Difference]: With dead ends: 1232 [2019-11-07 00:44:27,092 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:27,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 983 transitions. [2019-11-07 00:44:27,126 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 983 transitions. Word has length 97 [2019-11-07 00:44:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,126 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 983 transitions. [2019-11-07 00:44:27,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 983 transitions. [2019-11-07 00:44:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 00:44:27,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,131 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,131 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1046303197, now seen corresponding path program 1 times [2019-11-07 00:44:27,132 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926078587] [2019-11-07 00:44:27,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:27,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926078587] [2019-11-07 00:44:27,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:27,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268310000] [2019-11-07 00:44:27,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:27,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:27,336 INFO L87 Difference]: Start difference. First operand 631 states and 983 transitions. Second operand 5 states. [2019-11-07 00:44:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,415 INFO L93 Difference]: Finished difference Result 1232 states and 1938 transitions. [2019-11-07 00:44:27,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:27,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-11-07 00:44:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,423 INFO L225 Difference]: With dead ends: 1232 [2019-11-07 00:44:27,423 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:27,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 982 transitions. [2019-11-07 00:44:27,459 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 982 transitions. Word has length 98 [2019-11-07 00:44:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,461 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 982 transitions. [2019-11-07 00:44:27,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 982 transitions. [2019-11-07 00:44:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 00:44:27,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,463 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,463 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2126960382, now seen corresponding path program 1 times [2019-11-07 00:44:27,463 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,464 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432867181] [2019-11-07 00:44:27,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:27,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432867181] [2019-11-07 00:44:27,598 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:27,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990205376] [2019-11-07 00:44:27,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:27,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:27,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:27,604 INFO L87 Difference]: Start difference. First operand 631 states and 982 transitions. Second operand 5 states. [2019-11-07 00:44:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,674 INFO L93 Difference]: Finished difference Result 1232 states and 1936 transitions. [2019-11-07 00:44:27,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:27,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-07 00:44:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,680 INFO L225 Difference]: With dead ends: 1232 [2019-11-07 00:44:27,680 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:27,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 981 transitions. [2019-11-07 00:44:27,720 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 981 transitions. Word has length 99 [2019-11-07 00:44:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,720 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 981 transitions. [2019-11-07 00:44:27,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 981 transitions. [2019-11-07 00:44:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 00:44:27,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,723 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,723 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash -714656930, now seen corresponding path program 1 times [2019-11-07 00:44:27,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632751118] [2019-11-07 00:44:27,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:27,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632751118] [2019-11-07 00:44:27,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:27,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885583047] [2019-11-07 00:44:27,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:27,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:27,852 INFO L87 Difference]: Start difference. First operand 631 states and 981 transitions. Second operand 5 states. [2019-11-07 00:44:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,917 INFO L93 Difference]: Finished difference Result 1232 states and 1934 transitions. [2019-11-07 00:44:27,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:27,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-11-07 00:44:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,924 INFO L225 Difference]: With dead ends: 1232 [2019-11-07 00:44:27,924 INFO L226 Difference]: Without dead ends: 631 [2019-11-07 00:44:27,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-11-07 00:44:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-11-07 00:44:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-07 00:44:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 980 transitions. [2019-11-07 00:44:27,965 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 980 transitions. Word has length 100 [2019-11-07 00:44:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,966 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 980 transitions. [2019-11-07 00:44:27,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 980 transitions. [2019-11-07 00:44:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:44:27,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,968 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,968 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash 670014941, now seen corresponding path program 1 times [2019-11-07 00:44:27,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455376753] [2019-11-07 00:44:27,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:44:28,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455376753] [2019-11-07 00:44:28,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259134831] [2019-11-07 00:44:28,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:29,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:44:29,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:44:29,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:29,312 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:29,312 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:44:29,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097709913] [2019-11-07 00:44:29,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:44:29,313 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:29,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:44:29,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:29,314 INFO L87 Difference]: Start difference. First operand 631 states and 980 transitions. Second operand 3 states. [2019-11-07 00:44:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:29,412 INFO L93 Difference]: Finished difference Result 1772 states and 2800 transitions. [2019-11-07 00:44:29,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:44:29,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-11-07 00:44:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:29,422 INFO L225 Difference]: With dead ends: 1772 [2019-11-07 00:44:29,422 INFO L226 Difference]: Without dead ends: 1175 [2019-11-07 00:44:29,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2019-11-07 00:44:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1162. [2019-11-07 00:44:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2019-11-07 00:44:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1823 transitions. [2019-11-07 00:44:29,503 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1823 transitions. Word has length 101 [2019-11-07 00:44:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:29,505 INFO L462 AbstractCegarLoop]: Abstraction has 1162 states and 1823 transitions. [2019-11-07 00:44:29,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:44:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1823 transitions. [2019-11-07 00:44:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 00:44:29,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:29,507 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:29,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:29,715 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash -60893374, now seen corresponding path program 1 times [2019-11-07 00:44:29,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:29,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911118178] [2019-11-07 00:44:29,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:44:29,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911118178] [2019-11-07 00:44:29,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389151991] [2019-11-07 00:44:29,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:30,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:44:30,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:44:30,590 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:30,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:30,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:44:30,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724606695] [2019-11-07 00:44:30,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:44:30,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:44:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:30,739 INFO L87 Difference]: Start difference. First operand 1162 states and 1823 transitions. Second operand 3 states. [2019-11-07 00:44:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:30,846 INFO L93 Difference]: Finished difference Result 2834 states and 4488 transitions. [2019-11-07 00:44:30,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:44:30,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-11-07 00:44:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:30,859 INFO L225 Difference]: With dead ends: 2834 [2019-11-07 00:44:30,859 INFO L226 Difference]: Without dead ends: 1706 [2019-11-07 00:44:30,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:30,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2019-11-07 00:44:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1657. [2019-11-07 00:44:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2019-11-07 00:44:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2619 transitions. [2019-11-07 00:44:30,939 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2619 transitions. Word has length 102 [2019-11-07 00:44:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:30,940 INFO L462 AbstractCegarLoop]: Abstraction has 1657 states and 2619 transitions. [2019-11-07 00:44:30,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:44:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2619 transitions. [2019-11-07 00:44:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 00:44:30,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:30,943 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:31,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:31,153 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2074498131, now seen corresponding path program 1 times [2019-11-07 00:44:31,154 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:31,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331302494] [2019-11-07 00:44:31,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:31,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331302494] [2019-11-07 00:44:31,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:31,396 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:31,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11416216] [2019-11-07 00:44:31,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:31,398 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:31,399 INFO L87 Difference]: Start difference. First operand 1657 states and 2619 transitions. Second operand 7 states. [2019-11-07 00:44:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:34,502 INFO L93 Difference]: Finished difference Result 4881 states and 7926 transitions. [2019-11-07 00:44:34,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:34,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2019-11-07 00:44:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:34,540 INFO L225 Difference]: With dead ends: 4881 [2019-11-07 00:44:34,540 INFO L226 Difference]: Without dead ends: 3258 [2019-11-07 00:44:34,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:44:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2019-11-07 00:44:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3188. [2019-11-07 00:44:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3188 states. [2019-11-07 00:44:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 5133 transitions. [2019-11-07 00:44:34,768 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 5133 transitions. Word has length 104 [2019-11-07 00:44:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:34,768 INFO L462 AbstractCegarLoop]: Abstraction has 3188 states and 5133 transitions. [2019-11-07 00:44:34,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 5133 transitions. [2019-11-07 00:44:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 00:44:34,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:34,772 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:34,772 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1784972550, now seen corresponding path program 1 times [2019-11-07 00:44:34,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:34,773 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544519252] [2019-11-07 00:44:34,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:44:35,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544519252] [2019-11-07 00:44:35,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035309930] [2019-11-07 00:44:35,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:35,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:44:35,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:44:35,862 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:36,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:44:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:36,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:36,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-11-07 00:44:36,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199893306] [2019-11-07 00:44:36,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:44:36,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:44:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:44:36,197 INFO L87 Difference]: Start difference. First operand 3188 states and 5133 transitions. Second operand 11 states. [2019-11-07 00:44:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:40,696 INFO L93 Difference]: Finished difference Result 14278 states and 23484 transitions. [2019-11-07 00:44:40,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 00:44:40,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2019-11-07 00:44:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:40,849 INFO L225 Difference]: With dead ends: 14278 [2019-11-07 00:44:40,849 INFO L226 Difference]: Without dead ends: 11124 [2019-11-07 00:44:40,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-11-07 00:44:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11124 states. [2019-11-07 00:44:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11124 to 11004. [2019-11-07 00:44:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11004 states. [2019-11-07 00:44:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11004 states to 11004 states and 17646 transitions. [2019-11-07 00:44:42,009 INFO L78 Accepts]: Start accepts. Automaton has 11004 states and 17646 transitions. Word has length 105 [2019-11-07 00:44:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:42,009 INFO L462 AbstractCegarLoop]: Abstraction has 11004 states and 17646 transitions. [2019-11-07 00:44:42,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:44:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11004 states and 17646 transitions. [2019-11-07 00:44:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 00:44:42,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:42,011 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:42,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:42,228 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1620322121, now seen corresponding path program 1 times [2019-11-07 00:44:42,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:42,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578958192] [2019-11-07 00:44:42,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:44:42,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578958192] [2019-11-07 00:44:42,488 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:42,488 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:42,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112452783] [2019-11-07 00:44:42,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:42,489 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:42,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:42,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:42,489 INFO L87 Difference]: Start difference. First operand 11004 states and 17646 transitions. Second operand 4 states. [2019-11-07 00:44:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:42,921 INFO L93 Difference]: Finished difference Result 21992 states and 35591 transitions. [2019-11-07 00:44:42,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:42,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-11-07 00:44:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:43,043 INFO L225 Difference]: With dead ends: 21992 [2019-11-07 00:44:43,043 INFO L226 Difference]: Without dead ends: 11022 [2019-11-07 00:44:43,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2019-11-07 00:44:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 10986. [2019-11-07 00:44:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10986 states. [2019-11-07 00:44:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10986 states to 10986 states and 17545 transitions. [2019-11-07 00:44:43,694 INFO L78 Accepts]: Start accepts. Automaton has 10986 states and 17545 transitions. Word has length 105 [2019-11-07 00:44:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:43,697 INFO L462 AbstractCegarLoop]: Abstraction has 10986 states and 17545 transitions. [2019-11-07 00:44:43,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10986 states and 17545 transitions. [2019-11-07 00:44:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 00:44:43,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:43,700 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:43,700 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1143886479, now seen corresponding path program 1 times [2019-11-07 00:44:43,701 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:43,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996899268] [2019-11-07 00:44:43,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 00:44:43,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996899268] [2019-11-07 00:44:43,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:43,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:43,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117141714] [2019-11-07 00:44:43,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:43,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:43,853 INFO L87 Difference]: Start difference. First operand 10986 states and 17545 transitions. Second operand 7 states. [2019-11-07 00:44:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:47,161 INFO L93 Difference]: Finished difference Result 32938 states and 54494 transitions. [2019-11-07 00:44:47,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:47,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-07 00:44:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:47,331 INFO L225 Difference]: With dead ends: 32938 [2019-11-07 00:44:47,332 INFO L226 Difference]: Without dead ends: 21986 [2019-11-07 00:44:47,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:44:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2019-11-07 00:44:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 21800. [2019-11-07 00:44:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21800 states. [2019-11-07 00:44:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21800 states to 21800 states and 35491 transitions. [2019-11-07 00:44:49,110 INFO L78 Accepts]: Start accepts. Automaton has 21800 states and 35491 transitions. Word has length 113 [2019-11-07 00:44:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:49,112 INFO L462 AbstractCegarLoop]: Abstraction has 21800 states and 35491 transitions. [2019-11-07 00:44:49,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 21800 states and 35491 transitions. [2019-11-07 00:44:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-07 00:44:49,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:49,115 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:49,116 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:49,116 INFO L82 PathProgramCache]: Analyzing trace with hash -367218449, now seen corresponding path program 1 times [2019-11-07 00:44:49,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:49,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663297198] [2019-11-07 00:44:49,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 00:44:49,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663297198] [2019-11-07 00:44:49,240 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:49,240 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:49,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725487493] [2019-11-07 00:44:49,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:49,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:49,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:49,241 INFO L87 Difference]: Start difference. First operand 21800 states and 35491 transitions. Second operand 4 states. [2019-11-07 00:44:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:49,956 INFO L93 Difference]: Finished difference Result 43674 states and 71885 transitions. [2019-11-07 00:44:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:49,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2019-11-07 00:44:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted.